Logic Board - Icom IC-M401EURO Service Manual

SECTION 11 VOLTAGE DIAGRAM

11-1 LOGIC BOARD

DS1
TTR5341
1 SEG26
S27
S28 2 SEG27
S13 3 SEG12
4 SEG13
S14
5 SEG14
S15
6 SEG15
S16
7 SEG16
S17
S18 8 SEG17
S19 9 SEG18
10 SEG19
S20
11 SEG20
S21
12 SEG21
S22
13 SEG22
S23
S24 14 SEG23
S25 15 SEG24
S26 16 SEG25
17 COM0
C0
18 COM1
C1
19 COM2
C2
20 COM3
C3
21
S1 SEG0
S2 22 SEG1
S3 23 SEG2
24 SEG3
S4
25 SEG4
S5
26 SEG5
S6
S7 27 SEG6
S10 28 SEG9
S11 29 SEG10
30 SEG7
S8
31 SEG8
S9
32 SEG11
S12
IC3
BU4094BCFV
1 VDD 16
EXSTB
STRB
2 15
PDATA
DATA OENA
PCK 3 Q5 14
CLK
RMUTM 4 Q6 13
Q1
5 Q7 12
Q2
PTTM 6 Q8 11
Q3
7 Q'S 10
Q4
8 QS 9
VSS
R34 IC7
470
PC357N6T
D1
ISS355
C9
0.0047
D6
MA8062 M
R35 C13
0.01
6.8 k
0.00 V
Q5
C26
2SC4081 R
0.01
D5
R36
R77
MA8062 M
4.7 k
47
Q7
C25
2SA1576 R
7 0.01
J1
1
2
from/to R89
3
DSC terminal D2 160 k
4
DS100 ISS355
ICF3
5
6 Q9
DTA114EU
8
Q6
DTC114EU
D3
R39
MA8062 M
47 k
D4
MA8062 M
4.79 V
R20 18 k
DIM3
R21
DS7
18 k
FY1101 F-TR DIM2
DS8 R22
FY1101 F-TR
18 k
DIM1
R26
330
NMEAO
NMEAI
5V
EXOE
R78
RCV
100 k
SEND
C14
0.01
PTTM CONT1
CONT2
RMUTM BEEPM
EXOE
CH16
9.83 MHz
CH
3.8 Vp-p
H/L
NMEAO C24 HANG
27 P
NMEAI
IC6
X1
R84
R45
CR-691
S-80942 ANMP-DD6 10 k
39 k
5 OUT 1
CD
VDD 2 C28 24 P
RES
4
3 PCK
NC VSS
PSTB
PDATA
C10
EXSTB
0.027
BPLVL
R44
ECK
39 k EDA
DIM1
IC2
DIM2
HN58X2432TI
1 VCC 8
A0
2 WP 7
A1 R80 10 k
3 6
A2 SCL
4 5
VSS SDA R81 10 k
C12
0.01
IC7
TC74HC14AF
DIM3
C11
0.01
RRXD
RTXD
R46
8.2 k
2SK1069 4
R47
10 k
Q3
R10
2SB1132 R
27
R17
VCC
10 k
R12
R11
R15
12 k
27
39 k
Q2 Q4
BAND EXTENTION
2SC4116 BL
2SC4116 BL R83
R18
27
10 k
C21
C20
R19 R13 C32
0.001
0.01
10 k R14 3.3 k 0.001
R16
1 k
47 k
VCC
R76
R75
100 k
150 k
R74
47 k
5V
1
P10/TMOW
2
P11/TMOFL
3
P12/TMOFH
4
P13/TMIG
5
P14/IRQ4/ADTRG
6
P15/IRQ1/TMIC
7
P16/IRQ2
8
P17/IRQ3/TMIF
9
X1
10
X2
R7 11 IC1
VSS
1 M 12
HD6473847 RH
OSC2
13
OSC1
14
TEST
15
RES
16
P20/SCK1
17
P21/SI1
18
P22/SO1
19
P23
20
P24
21
P25
22
P26
23
P27
24
P30/PWM
25
P31/UD
R79
100 k
ATIS
R85
3.3 k C30
0.01
Q11
DSENC1
R62
R63
20 k 20 k
R72
R52 R54 R53
R55
10 k 10 k 10 k 20 k
10 k
R50 R51
15 k 1.5 k
4.68 V at CONT3
TAG
SCN
UP
DN
R4
R1 R2 R3
100 k 100 k 100 k 100 k
S1 S2 S3 S4
R86
100 k
5V
TAG SCN UP DN 16CH
R6
DS3 DS4
820
SML-311 YT
SML-311 YT
9.87 V: BRIGHT
6.14 V: MIDDLE
VCC 4.12 V: DARK
0.00 V: LAMP OFF
PTT
KEYM
C2
0.001
R87 100 k
VCC
TMUT
Q1
R9
C8
BEEPM
33 k
DAT144EU 10
BPLVL
RCV
C18
SEND
0.01
TMUT
TXDET
P90/SEG33 75 ATIS
SEG24
P87/SEG32 74 HI/LO
SEG23
P86/SEG31 73 SEG22
SQLV
P85/SEG30 72 SEG21
P84/SEG29 71 SEG20
PTT
P83/SEG28 70 SEG19
P82/SEG27 69 SEG18
P81/SEG26 68 BPFV
SEG17
P80/SEG25 67 PTTM
SEG16
P79/SEG24 66 SEG15
RMUTM
P76/SEG23 65 SEG14
P75/SEG22 64 SEG13
P74/SEG21 63 SEG12
P73/SEG20 62 SQL
SEG11
P72/SEG19 61
SEG8
UNLK
P71/SEG18 60 SEG7
PDATA
P70/SEG17 59 SEG10
PSTB
P67/SEG16 58 SEG9
PCK
P66/SEG15 57 SEG6
P65/SEG14 56 SEG5
P64/SEG13 55
SEG4
P63/SEG12 54
SEG3
P62/SEG11 53 SEG2
P61/SEG10 52 SEG1
51 SEG0
P60/SEG9
5V
4.98
C22 C23
0.01
10
ATIS
DSENC7
2SK1069 4
DSENC6
DSENC5
DSENC4
R73
DSENC3
220 k
DSENC2
R66
R64 R67 R68
R65
R69
20 k 20 k
20 k 20 k 20 k
20 k
R56 R57 R58 R59 R60 R61
10 k 10 k 10 k 10 k 10 k
10 k
11 - 1
TAG
SCN
UP
DN
CH16 CH16
CH CH
H/L
S5 S6 S7
CH H/L
DS5 R5
DS6
SML-311 YT SML-311 YT 820
SP
to Internal Speaker
SP+
C1
0.001
J4
SP+
40
SP+
39
38
SP
37
SP
36
BEEPM
35
BPLVL
34
33
VSS
32
VSS
31
from/to main unit J6
30
5V
29
5V
28
RCV
27
26
SEND
25
24
23
TMUT
22
21
TXDET
20
ATIS
19
HI/LO
18
17
SQLV
16
15
PTT
14
13
BPFV
12
PTTM
11
10
RMUTM
9
8
7
SQL
6
5
UNLK
4
PDATA
3
PSTB
2
PCK
1
C5 C3
0.001 0.001
C6
C4
470 P
470 P
5V
R88
R8
10 k 100 k
4
HANG
1
J3
KEYM
2
from HM-132
3
C7
5
0.01
2.50 V at NO ATIS-Signal
Q8
C31
R70
0.01
820 k
R71
2.7 k